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<html lang="en">
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    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //借用父构造函数继承属性
        function Father(uname,age)
        {
            this.uname=uname;
            this.age=age;
        }
        Father.prototype.money=function(){
            console.log('挣钱100');
        }
        function Son(uname,age,score){
            //Father(uname,age);
            Father.call(this,uname,age);
            this.score=score;
        }
        Son.prototype = new Father();
        Son.prototype.constructor = Son;
        Son.prototype.exam = function(){
            console.log('孩子要考试');
        }
        var son = new Son('刘德华',18,100);
        var farther = new Father('张学友',20,80);
        console.log(son);
        console.log(farther);
    </script>
</body>
</html>